Pilikuls are another product of Salangan genetic engineering, used as the strongest natural aphrodisiac of massive action. The jellyfish were launched into artificial ponds and pools of fish farms of Salangan, which sharply increased the fish offspring.
It acted on everyone, so Salangans themselves did not mind playing a bit, which is why jellyfish were sold to everyone. As a result, at the time of the Exodus, many of these creatures were splashing in rivers of Salangan.
Fortunately, piliculs themselves were unable to multiply, which saved the planet from dramatic overpopulation with other biological species.